If your granddaughter is well with no symptoms of diabetes like weight loss, tiredness, increased thirst or passing of urine, then I would refrain from testing her blood glucose levels. If she has symptoms then I would have her formally tested at her doctor by doing a lab glucose. Certainly if her levels post a meal are less than 11.1, then she is not diabetic, as the cut offs for diabetes are a fasting glucose level of 7 or more and a random reading of 11.1 or more.
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